class_docstr: We abuse the code generator for introspection.
code: def __init__(self, environment):
      CodeGenerator.__init__(
          self, environment, "<introspection>", "<introspection>"
      )
      self.undeclared_identifiers = set()
  
file_path: catboost/contrib/python/Jinja2/py2/jinja2/meta.py
imports: from .None import nodes
  from ._compat import iteritems
  from ._compat import string_types
  from .compiler import CodeGenerator
label_desc: Use image node_id 1 to create a new TrackingCodeGenerator object from inherited base classes: CodeGenerator with example: obj = TrackingCodeGenerator(environment)